Valve Drive Parts

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Stainless Valve Stem for Ball Valves

The stainless valve stem is the key part that connects the actuator or handle to the valve ball, transmitting torque and ensuring reliable opening and closing. At Yining Machinery, we manufacture every stainless valve stem from solid stainless steel bar with full CNC machining and strict dimensional control.

Available materials include 304, 316, 316L, and 17-4PH, which provide excellent corrosion resistance and mechanical strength. Each stem is produced according to customer drawings and meets common industrial standards such as API 6D and ASME B16.34.

Design & Production

The upper section of the stem fits the actuator drive, while the lower end engages precisely with the ball slot. Our machining process focuses on tight tolerances, smooth surface finish, and stable torque performance.

Main production steps include:

• CNC turning, milling, and threading

• Precision grinding and polishing

• Heat treatment for 17-4PH types

• Passivation or nickel plating for extra corrosion protection

• 100% inspection for dimensions and surface quality

Every stainless valve stem is tested for hardness, runout, and surface finish before packing.

Technical Specifications

Key Advantages

• High corrosion and wear resistance

• Stable torque and smooth valve operation

• Long service life under continuous load

• Suitable for both floating and trunnion ball valves

• Fully customizable per customer drawing

Our stainless valve stem design ensures consistent performance and tight sealing even in harsh environments such as chemical, oil, and gas applications.

Applications

• Oil & gas pipeline valves

• Chemical processing plants

• Power generation and steam systems

• Water treatment and desalination

• General industrial automation

Quality Control

Each stainless valve stem is produced under a controlled ISO-quality process. Dimensional accuracy, thread gauge, and concentricity are checked for every batch. PMI, hardness, and visual inspection reports can be supplied with each order.

FAQ

Q1: Can you manufacture stems according to our drawing?

Yes, OEM machining is fully supported based on CAD or physical samples.

Q2: Which material is recommended for corrosive environments?

316L or 17-4PH provides the best resistance in such conditions.

Q3: Do you provide inspection reports?

Yes, EN 10204 3.1, PMI, and hardness certificates are available.

Q4: Can small orders be accepted?

Yes, sample and low-volume production of stainless valve stems are welcome.

DETAIL PICTURE

Item	Details
Material	Stainless Steel 304 / 316 / 316L / 17-4PH
Hardness	28–36 HRC
Surface Finish	Ra 0.8–1.6 μm
Tolerance	±0.02 mm
Heat Treatment	Solution annealed or aged (H900 / H1025)
Certification	EN 10204 3.1 available

Stainless Valve Stem for Ball Valves

Design & Production

Technical Specifications

Key Advantages

Applications

Quality Control

FAQ

DETAIL PICTURE

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